body {
    font-size: 16px;
    line-height: 28px;
    font-family: "Microsoft Yahei";
}

h1 {
    text-align: center;

    font-weight: 400;
}

.gray {
    color: #999999;
    text-align: center;
    font-size: 12px;
}

a {
    text-decoration: none;
}

p {
    text-indent: 2em;
    line-height: 26px;
}

.pic {
    /* 想要让图片据中方对齐，则是让它的父亲 p 标签添加 水平居中的代码 */
    text-align: center;
}

.laiyuan {
    color: #999999;
    size: 10px;
    font-size: 5px;
}

.quary {
    width: 170;
    color: #666;
}

.btn {
    font-weight: 700;
}